After extensive reverse engineering and structural & electrical and material analysis of the 2 mentioned models i don't advice to use with any radio as the design is flawed and you simply are throwing your money away "
Tram 1411 coil gets water logged and after RF arcing & will damage your radio
specially in 11-10 meter bands
Radials design is ok ...stainless but the aluminum pipe bottom adapter gets trashed with electrolysis
Harvest D130 upper coil design is just an screw in spring that will arc heat up and burn under hi RF power also possibly damaging your radio
its aluminum radials rust off really fast electrolisys water also gets inside the connector be it n or PL 259
Anyone interested in antenna manufacture can contact me for substitute designs ...or lets pitch in and design our own antenna ? anyone willing to buy Tram stock after they go bankrupt with their junk ?
(H)